Let's divide 7969471 by 90
The aim is to understand the frequency of 90 in 7969471.

Step 1:
When dividing 7 by 90, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (9) from the dividend to 7 and continue with: 79 / 90

Going ahead to step 2:
The number 90 fits into 79 0 times, leaving a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 79 to get 79.
Grab the next digit (6) from the dividend, add it to 79, then carry on: 796 / 90

Going ahead to step 3:
90 can be fit into 796 8 times, resulting in a remainder of 76.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 76 after subtracting 720 from 796.
Take the next digit (9) from the dividend and append it to 76, then repeat: 769 / 90

Moving on to step 4:
90 can be fit into 769 8 times, resulting in a remainder of 49.
Write down 8 as next digit of the result. 
Result so far: 88.0
If we subtract 720 from 769, we get 49.
Fetch the next digit (4) from the dividend, attach it to 49 and continue: 494 / 90

Moving on to step 5:
90 can be fit into 494 5 times, resulting in a remainder of 44.
The next digit of our result is 5. 
Result so far: 885.0
The remainder is 44 after subtracting 450 from 494.
Grab the next digit (7) from the dividend, add it to 44, then carry on: 447 / 90

Let's proceed to step 6:
If we divide 447 by 90, we get 4 and a remainder of 87.
Use 4 as the next digit of our solution. 
Result so far: 8854.0
If we take 360 away from 447, we end up with 87.
Take the next digit (1) from the dividend and append it to 87, then repeat: 871 / 90

Going ahead to step 7:
871 divided by 90 is 9 with a remainder of 61.
Put 9 as the next digit of the answer. 
Result so far: 88549.0
Deduct 810 from 871 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 8:
90 can be fit into 610 6 times, resulting in a remainder of 70.
The next digit of our result is 6. 
Result so far: 88549.6
The remainder is 70 after subtracting 540 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 9:
90 goes into 700 7 times with a remainder of 70.
Put 7 as the next digit of the answer. 
Result so far: 88549.67
Subtract 630 from 700 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 10:
90 can be fit into 700 7 times, resulting in a remainder of 70.
The next digit of our result is 7. 
Result so far: 88549.677
Subtracting 630 from 700 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The quotient of the division is 88549.677, and the remainder is 0.007.